/**
 * Created by PanJiaChen on 16/11/18.
 */

/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string | null}
 */
export function parseTime(time, cFormat) {
  if (arguments.length === 0 || !time) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if ((typeof time === 'string')) {
      if ((/^[0-9]+$/.test(time))) {
        // support "1548221490638"
        time = parseInt(time)
      } else {
        // support safari
        // https://stackoverflow.com/questions/4310953/invalid-date-in-safari
        time = time.replace(new RegExp(/-/gm), '/')
      }
    }

    if ((typeof time === 'number') && (time.toString().length === 10)) {
      time = time * 1000
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{([ymdhisa])+}/g, (result, key) => {
    const value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value] }
    return value.toString().padStart(2, '0')
  })
  return time_str
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime(time, option) {
  if (('' + time).length === 10) {
    time = parseInt(time) * 1000
  } else {
    time = +time
  }
  const d = new Date(time)
  const now = Date.now()

  const diff = (now - d) / 1000

  if (diff < 30) {
    return '刚刚'
  } else if (diff < 3600) {
    // less 1 hour
    return Math.ceil(diff / 60) + '分钟前'
  } else if (diff < 3600 * 24) {
    return Math.ceil(diff / 3600) + '小时前'
  } else if (diff < 3600 * 24 * 2) {
    return '1天前'
  }
  if (option) {
    return parseTime(time, option)
  } else {
    return (
      d.getMonth() +
      1 +
      '月' +
      d.getDate() +
      '日' +
      d.getHours() +
      '时' +
      d.getMinutes() +
      '分'
    )
  }
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function param2Obj(url) {
  const search = decodeURIComponent(url.split('?')[1]).replace(/\+/g, ' ')
  if (!search) {
    return {}
  }
  const obj = {}
  const searchArr = search.split('&')
  searchArr.forEach(v => {
    const index = v.indexOf('=')
    if (index !== -1) {
      const name = v.substring(0, index)
      const val = v.substring(index + 1, v.length)
      obj[name] = val
    }
  })
  return obj
}
export function _isMobile() {
  const flag = navigator.userAgent.match(/(phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|BlackBerry|IEMobile|MQQBrowser|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Symbian|Windows Phone)/i)
  return flag
}
/** 获取本月、上月、下月的起始日、结束日 (不传或0代表本月，-1代表上月，1代表下月)*/
// 1.调用方法 getMonth("s",0)、getMonth("e",0)
// 2.type 为"s"代表开始日期,type为"e"代表结束日期
// 3.dates  不传或0代表本月，-1代表上月，1代表下月
export const getMonth = (type, months) => {
  var d = new Date()
  var year = d.getFullYear()
  var month = d.getMonth() + 1
  if (Math.abs(months) > 12) {
    months = months % 12
  }
  if (months !== 0) {
    if (month + months > 12) {
      year++
      month = (month + months) % 12
    } else if (month + months < 1) {
      year--
      month = 12 + month + months
    } else {
      month = month + months
    }
  }
  month = month < 10 ? '0' + month : month
  var date = d.getDate()
  var firstday = year + '-' + month + '-' + '01'
  var lastday = ''
  if (month == '01' || month == '03' || month == '05' || month == '07' || month == '08' || month == '10' || month == '12') {
    lastday = year + '-' + month + '-' + 31
  } else if (month == '02') {
    if ((year % 4 == 0 && year % 100 != 0) || (year % 100 == 0 && year % 400 == 0)) {
      lastday = year + '-' + month + '-' + 29
    } else {
      lastday = year + '-' + month + '-' + 28
    }
  } else {
    lastday = year + '-' + month + '-' + 30
  }
  var day = ''
  if (type == 's') {
    day = firstday
  } else {
    day = lastday
  }
  return day
}

